Combined tkpkwkiting and computing



May 30, 1939. H. L. PITMAN 2,160, 87

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed April 2, 1956 10Sheets-Sheet 1 'NVENTORI y 1939- H. PITMAN 2,160,487

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed April 2, 1956 10Sheets-Shept 2 May 30, 1939. H. PITMAN COMBINED TYPEWRITING ANDCOMPUTING MACHINE Filed April 2, 1956 10 Sheets-Sheet 3 lam. 1/95/24 May30, 1939. H. L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINENVENTORJ- y 30, 3 H. PITMAN 2,160,487

COMBINED TYPEWRITING AND COMPUTING HACHINE l0 Sheets-Sheet 5 Arron May1939- H. L. PITMAN 2,160,487

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed April 2, 1936 1QSheets-Sheet 6 Z3? m 236 Z93 INVENTOR:

10 Sheets-Sheet 7 May 30, 939- H. L. PITMAN COMBINED TYPEWRITING ANDCOIPUTING MACHINE Filed April 2. 1936 May 30, 1939- H. L. PITMANCOMBINED TYPEWRITING AND COMPUTING MACHINE Filed April 2, 1936 10Sheets-Sheet 8 INVENTOR:

720. ITIIIIIIIIIiIIIIIIIIVYI ll II'IIIIIIII X XXX X X XXX XX X XXX XXXXXX XX Ano May 30, 1939.

H. L. PITMAN COMBINED TYPEWHITING AND COMPUTING MACHINE Filed April 2,1936 10 Sheets-Sheet 9 May 30, 1939. H. L. PITMAN COMBINED TYPEWRITINGAND COMPUTING MACHINE Filed April 2. 1936 10 Sheets-Sheet 1O NVENTOR:

ATTORNEY.

Patented May 30, 1939 UNITED STATES COMBINED G AND GOMFUTING Henry L.Pitman, Hartford, Coma, asslgnor to Underwood Elliott Fisher Company,New York, N. Y., a corporation oi Delaware Application April 2, 1936,Serial No. 72,848

'IOlalms.

This invention relates to a combined typewriting and computing machineof the Underwood- Hanson class, exemplified in my United States Patent1,927,951, dated September 26, 1933.

In said machine, typewrlting mechanism is operatively connected to acomputing mechanism which includes one or more sets 01' computingwheels, a set of indexable drivers for each set of wheels and a generaloperator for the drivers.

Operation of the numeral-type keys to print an amount, while theletter-feed carriage traverses a computing zone, causes said amount tobe indexed in said drivers; the carriage acting at said zone, by means01' denomination-selecting mechanism, to shift the drivers seriatim intoposition wherein numeral-type-key-operated digitindexing mechanism iseflective to set digit-pins in the drivers. The general operator iscycled after the idexing oi the drivers to actuate the latter, by meansof the set digit-pins, to accumulate said amount in the computingwheels.

Totals are accumulated, according to item classification, in differentregisters, each of which may be of large grand-total capacity, say acapacity of twelve denominations. With reference to lesser totals, whichmay never exceed say six denominations, the large register has an excesscapacity.

An object 01 the invention is to make provision for utilizing saidexcess capacity or higher denominations of a register for accumulating alesser total, aside from another lesser total which may be accumulatedin the lower denominations of the register. Thus, instead of having saytwo individual or separate register-units, each 01' large grand-totalcapacity, the machine would have, comparatively, a single register oflarge capacity for large totals, and usable sectionally ior accumulatingtwo or more'lesser totals.

The invention provides novel means for selecting automatically, undercontrol of the carriage, different sections of a register. For example,the carriage, at a given computing zone, may effect, by said means,selection or one section oi the large capacity register for onelesser-total classification, and may effect, at another zone, selectionof another section of said same register for another lesser-totalclassification. Said .novei means include provision whereby the carriagemay effect, at a given zone, selection of two or more sections of theregister for a total or item involving up to the full-register capacity01 denominations. In accordance with these aims, the invention alsomakes novel provision whereby the denomination-selecting mechanism anddenominational tabulating-key mechanism, which are each of full-registerrange of denominations, are properly correlated to the sectional or fulluse oi the register. By said latter provision, tabulation of thecarriage to the units denomination of a computing zone, for example,would cause the carriage at said denomination to select thecomputing-wheel driver which co'nesponds to the units denomination ofwhichever register-section is selected for said none and shiit saiddriver to the above-mentioned indexing position.

A localized field of register-controls traversed by thetypewriter-carriage includes a series of denominational Jacks serving toshift the computing-wheel drivers seriatim to said indexing positions,one jack for each denomination of the register of large grand-totalcapacity. Said localized control field also includes, for eachpredetermined sectional part of a large capacity register, an elementwhich is selectably engaged by the carriage to determine use of saidsectional part 01' the register at a computing zone.

The invention is applicable to a machine having one or more than one ofthe large capacity registers, in that it may be applied to operate oneor more of said large registers sectionally.

For example, in the herein-illustrated machine, three register units oflarge capacity are shown, and each register unit is usable by means ofthe invention as a large capacity register, or sectionally as two lessercapacity registers. Only one series of denominational jacks is providedconsonantly with the localization of the field oi register-controls; andsaid single or master series of jacks may have connections ramifying tothe several sets of computing-wheel drivers corresponding to theplurality of large capacity register units. The several sets oi.branches, into which said connections ramify, are normally disconnectedirom their corresponding sets of computing-wheel drivers. For thepurpose of the invention, a set of the computing-wheel drivers may beconnected sectionally to its set of branches of the series ofdenominational jacks, in that, while one section of the set of thecomputingwheel drivers is connected to the companion ones of said set ofbranches, another section of the same set of drivers is not soconnected, this being effected under the control of thetypewriter-carriage by means of the above-mentionedregistersection-selecting elements included in said 10- calized field ofregister-controls.

Said register-section-selecting elements are controllable by tappetsprovided on the carriage, and said elements and tappets are proportionedso that the control is coextensive with the number of denominations ofthe register-section. One of said tappets is provided for eachamountcomputlng column of the work-sheet, and a denomination-selectingtappet, ior traversing the set of denominational jacks, is also providedon the carriage for each work-sheet column. The provision 01' saidregister-section-selecting elements and tappets to effect control whichis limited to the number 01' denominations oi the register-sectionscontrolled by the respective ones of said elements, makes it feasible tomake the spacing of the work-sheet columns or zones substantiallycommensurate with the number of registerdenominations used for eachcolumn. whereby excessive separation of the work-sheet columns, onaccount of use of the large capacity register for accumulating smallitems, is avoided.

Certain features of the invention relate to novel menus whereby astate-controller, which in the present machine is provided for eachregister unit of large capacity, serves for predetermining addition orsubtraction for either of the register sections as well as for theentire register unit.

The invention also deals with the provision of improved means forsilencing the register-controls, as, for example, during operation ofthe type-writer-carriage in uppercase typing. A novel latch-devicemaintains the register-controls in operative relation to the carriage,and may be tripped, with little effort, to silence operation by thecarriage of said register-controls.

Coincident with a shift to upper case, for example, said iatch-device istripped, and, the tripping requiring very little effort, the usual easeof touch of the case-shift key is not impaired. Coincident with theshift backto lower case, a power-operated cycling'mechanism provided inthe computing base is tripped to effect restoration of theregistercontrols to the control of the carriage; said cycling mechanismbeing thus used as the power-operated medium to relieve the case-shiftkey of any burden incident to the silencing of the register-controls.Provision may be made whereby said latch-device and cycling mechanismare tripped in appropriate order to respectively silence and restoreoperativeness of the register-controls in conjunction with starting andstopping operation of a power-operable carriagereturn mechanism. Anon-compute key may trip said latch-device for silencing operativenessof the register-controls, but is not operative to trip the cyclingmechanism, since it is desired that the machine shall remain innon-computing condition until the register-controls are restored tooperativeness by tripping the cycling mechanism independently, as forexample, by manually operating the manual cycling-tripping key. Since,in the computing state of the machine, operation of the case-shiftmechanism or of the carriage-return mechanism first silences and thenrestores operativeness of the register-controls, novel pro vision ismade whereby, during the non-computing state of the machine efl'ected bymeans of the non-computing key, the register-control-restoring functionof the case-shift and carriage-return mechanisms is silenced.

A tappet-unit is placed on the carriage for each computing zone and mayinclude a tooth for engaging the denominational jacks, and aregisterselecting tappet which is differently locatable on the tappetunit for engaging a certain registerselecting element. Novelimprovements in the tappet-unit, in the rack structure on the carriagewhich supports said unit, and in devices which brace said rackstructure, conduce to proper operation of the register-controls andfacilitate setting up the tappet-units for different arrangements ofwork-sheets.

The invention also deals with improvements over the co-pendingapplication No. 563,033 of O. Thieme, filed September 16, 1931 nowPatent No. 2,075,557, dated March 30, 1937, said improvements pertainingto the construction of the computing-wheel drivers or register-barswhich each have settable digit-pins and means whereby the setting of adigit-pin restores a pin which was previously set; the improvementsconducing to economy in the manufacture of the parts constituting thecomputing-wheel drivers and to enduring serviceability of said parts.

Other features and advantages will hereinafter appear.

In the accompanying drawings:

Figure 1 represents a continuation of the left side of Figure 2.

Figure 2 is a sectional side elevation of the combined typewriting andcomputing machine including mechanism in which the invention isembodied.

Figure 3 is a perspective of the mechanism in the computing basecomprising the lower portion of the set of denominational selectingtrains, the means whereby said trains ramify to a plurality of sets ofcomputing-wheel drivers or registerbars and the means whereby one ormore sets of computing-wheel drivers are connectibie section ally tosaid denomination trains, some of the parts being sectioned to clarifydetails.

Figure 4 is a perspective, companion to Figure 3, showing the uppermechanism whereby the typewriter carriage controls the portions of thedenomination and register section selecting mechanisms seen in Figure 3.

Figure 5 is a perspective of the novel tappetunit, some of the partsbeing shown apart from the unit to clarify details.

- Figures 6 and '7 are cross-section views of the tappet-unit takenrespectively'on the traces 6-5 and |--l of Figure 5.

Figure 8 is a perspective, partly sectionel, of a portion of theregister-section selecting mechanism in the computing base and the meanswhereby operation of the cycling mechanism serves to insure restorationof said selecting mechanism.

Figure 9 is a front view, partly sectioned, of the devices whichsectionally operate the set of couplers that connect the register-barsto the denomination-selecting trains: and shows the means for eflectingwithdrawal of a state-controller latch at selective operation of saiddevices.

Figure 10 shows the mechanism of Figure 9 in perspective, the couplersbeing omitted, and some of the parts sectional to bring out details.

Figure 11 is a fragmentary pe pective of the state-controller andlatches therefor, and corresponds to a section on the trace ll-H ofFigure 10.

Figure 12 is similar to Figure 9, the latter representing thestate-controller latch withdrawn at engagement of one section of the setof couplers, while Figure 12 shows said latch withdrawn by engagement ofanother section of the couplers.

Figure 13 is a front view of the set of registerselectlng elements, thecompanion slides and the carriage-tappet unit for actuating saidelements; the view corresponding to a section on the trace 13-43 ofFigure 14.

Figure 14 is a front view of the tappet-unit and a register-selectingelement that is coextensive with two sections of the register and showssaid element operativeiy connected to two slides for controlling bothsections of the register.

Figure 15 is a sectional side view, showing the tappet-unit and itssupports, and also showin the denomination and register selecting trainsor controls, and the latch-device which normally maintains said controlsin operative condition;

the view representing said latch-device as being tripped near the startof a cycling operation.

Figure 16 is a sectional side view of the N818- ter-control mechanismand the mechanism for silencing and restoring operati of said mechanism.

Figure 17 is a front view of the register-sectionselecting elements andcompanion slides, and represents the engagement of one of said elementsby the tappet-unit.

Figure 18 is a front view of the set of denomination and punctuationjacks, and represents the tappet-unit in engagement with one of thepunctuation jacks for actuating a key-lock.

Figure 19 is a side view of the key-lock and the connections from thelatter to the set of pun'ctuation jacks.

Figure 20 is a perspective of the improved register-bar, partlysectioned to clarify details.

Figure 21 is a cross-section of the body of the register-bar, on-thetrace Ii-Il of Figure 22.

Figure 22 is a perspective of the register-bar parts separated toclarify details.

Figures 23 and 24 are cross-sections of the register-bar assembly, takenrespectively on the traces 23-23 and 24-24 of Figure 20.

Figure 25 is a sectional view on the trace 2B of Figure 22, showingdetails of the pivotal connection of a digit-pin interlock to adigit-pin keeper.

Figure 26 is a plan of the improved detachable rack-structure for thetappet-units.

Figure 27 is a plan of the tappet-unit rackstrueture and the part of thecarriage to which it is removably attachable as illustrated. I

Figure 28 is a diagram illustrating a work-sheet form and acorresponding set-up of tappet-units on the typewriter-carriagerelatively to the register-controls.

Figure 29 is a side elevation, showing a noncompute-key mechanism andthe means eontrollabie thereby for silencing the register-eontrols, theparts being shown in their normal positions for using the machine forcomputing.

Figure 30 is a side elevation showing the operation of a cycling shaftto restore the latch-devices which were tripped for silencing theregistercontrols.

Figure 31 is a side elevation showing the noncompute-key set tocondition the machine for non-computing, and the means actuated therebto silence the register-controls, and to operatively disconnect acycle-tripping device from the caseshift and carriage-retum controls forsaid device.

Figure 32 is a rear elevation of the latch-device and eo-operativemeans, in the computing base. for silencing the register-controls.

Figure 33 is a plan view of a portion of the mechanism, seen in Figure32, and parts related thereto.

In a machine of the Underwood-Hanson class. a typewriter-unit Asurmounts a computing base B, Figure 2.

I5, 46 and 41 represent, respectively, the keylevers. bell-cranks andtype-bars of the numeraltype actions of the typing system, the alphabettype-actions being represented by the alphabetkeys 8. The usualletter-feeding carriage 49 supports a case-shiftabie frame iii, in whicha platen ii is Journaled, said carriage running upon rails 52, 83mounted in the typewriter-frame 54.

At operation oi any type-action. the usual universal bar 55,escapement-dogs 56, feed-rack I1, escapement-wheel II and carriagespring-motor I9 co-operate to letter-feed the carriage II.

The computing base 13 may have one or more register-nails. Theregister-unit is of the kind shown in my aforesaid Patent 1,927,951, inthat provision for driving its computing wheels ll oppositely foraddition and direct subtraction includes a set of register-bars l2 andidlers II permanentiy in mesh with racks N on said registerbars. Saidcomputing wheels ii normally stand disengaged both from said idlers O3and said racks N, Figures 1 and 2, and means for shifting themrearwardly to mesh with said idlers, or

downwardly to mesh with said racks, include a shiftable frame 65, inwhich said computing wheels II are mounted.

Each register-bar has digit-pins 61, 01. For setting a digit-pin 61 in aregister-bar, the latter must be slightly advanced to align its pins 81with pin-setting bars 68 which form part of the usual set oiUnderwood-Hanson pin-setting linkages 69 representing diiferent digits.Each numeral key-lever 45 has a pendent rod Iii to engage an arm II of arock-shaft I2 to rock the latter and thereby actuate the correspondinglinkage B9 to set, in whichever register-bar is slightly advanced, thedigit-pin '61 corresponding to said numeral key-lever 45, each linkage69 including one of said rock-shafts 12.

A denominational tabulating mechanism is represented by denominationaltabulating keys 14, Figure 2. and denominational carriage-stops i5. Saiddenominational keys ll, stops I5, and the co-operating carriage-releasemeans, not shown, may be of the kind shown in Eelmond Patent No.1,858,447, dated May 17, 1932.

The machine is shown as haying three registerunits, each register-unithaving its individual set of register-bars 62 as represented in Figure3; it being understood that, for driving the companion set of computingwheels 6| reverseiy, there are associated with each set of register-bars82 a set of the idlers 63 and the shiitable frame 65 for said computingwheels.

The usual reciprocatory cross-bar- Ii of the cycling mechanism is commonto all of the register-bars 62. Said cross-bar I6 coacts with thedigit-pins 61, set in its path by the indexing operation, to advance theregister-bars to the indexed extents at the advance stroke of saidcrossbar, the computing wheels 6i having been first shifted, as will beexplained later on, to engage either the racks B4 or the idlers 63. Atthe return stroke of the cycling cross-bar 16, the latter engagesshoulders ll of the advanced registerbars 62 to return the latter, thecomputing wheels 6| having been disengaged first from the racks 64 oridlers 63. The usual spring-devices ll become eiiective to retract thereturned registerbars sufliciently from said cross-bar 18, after thelatter has reached the end of its return stroke, to permit the aforesaidslight advance oi the register-bars for the pin-setting operations.

Each of the three register-units is represented herein, by way ofexample, as having twelve register-bars 62 for accumulating totals up totwelve denominations. For each of said twelve denominations, there is adenominational tabulating stop I and its companion key M. Thedenominational stops I5 are guided vertically in a housing 19 on thetypewriter-frame 54, and, for each computing zone of the carriage 49,the latter presents a counter-stop Iii which is engaged by any upwardlyprojected denominational stop to arrest the tabulating advance of thecarriage at a corresponding denomination in said zone.

A set of denominational jacks 8! corresponds in number to the number ofdenominations (twelve) in a register-unit, and is grouped oehind the setof denominational carriage-stops I5. Said set of jacks is common to theseveral sets of register-bars 62, and the carriage presents for eachcomputing zone a tappet 02 for depressing said jacks seriatim as thecarriage traverses said zone step by step at operation of thenumeral-type actions.

Said denominational jacks 0| are in the form of rods guided verticallyin a housing 03, which is supported by attachment to the denominationalcarriage-stop housing I0, by means of a lower bracket 04, and an upperbracket-plate 05 which also spaces and guides said denominationaltabulating stops I5. For spacing and guiding the denominational jacks 0|and similar punctuation jacks 00, which are interspaced with saiddenominational lacks, the housing 03 has an upper slotted guide-bar 01and a companion faceplate 00, and also has lower guide-plates 00, 00.The denominational lacks iii are incorporated in the typewriter-unit Aand abut against companion rods 0| in the computing base B, the latterbeing provided with guide-plates 02, 03, for spacing and guiding saidrods 0I at their upper ends. Said rods 0| diverge to correspond inspacing, at their lower ends, with a set of bellcranks 04 mounted on afulcrum-rod 05, said bell-cranks 04 connecting said rods 0| to a set ofdenominational horizontal rods 30, mounted for endwise movement in aframe 01.

Said horizontal rods 00, bell-cranks 04, vertical rods 0| anddenominational jacks 0| form a master set of denominational trains,which for the purpose of the invention, may ramify to the register-bars02 of the several register-units. For accomplishing such ramificationuse is preterably made of certain devices, set forth in my copendingapplication Serial No. 604,691, filed April 12, 1932, namely, a bed ofcross-blades 98, one for each denomination, and sets of distributiveracks 00 corresponding to the sets of registerbars 82, and connected bysaid cross-blades 00 to said rods or master-racks 00; each cross-blade00 being connected to a master-rack 00 and all of the distributive racks00 of the same denomination by teeth I00, provided on each rack 00, 00.The cross-blades are rockable upon their lower edges in notches IOIafforded by the frame 01, which is supported by a cross-member I02 oithe computing base framework.

For connection and disconnection to and from its companion register-bar52, each distributive rack 90 has hinged thereto an arm or coupler I03.The full and dotted outlines in Figure 15 represent, respectively, thenormal or inefiective,

- and the effective positions of the coupler I03. In

the effective position, the

coupler I03, by engagement with a roll I00 on the register+bar 62,operatively connects the latter with the distributive rack 00, so that aslight advance of said rack 00 by the companion carriage-actuatedmaster-denominational train is transmitted to said register-bar 62, tobring its digit-pins 01 under the pin-setting bars 68. with the couplerin inefl'ective position, said slight advance of the distributive rack00 has no efiect on the register-bar 52.

For selectively using the register-unit sectionally novel means areprovided whereby the set of couplers for the register-unit may becontrolled sectionally by the carriage. For example, in the herein-shownregister-unit of twelve denominations, the section of six couplers I03for the six highest denominations and the section of six couplers' I03for the six lowest denominations, may be controlled independently of oneanother. In this way, the section of six highest denominations of thetwelve denomination register-unit and the section of six lowestdenominations of said register-unit, may be used independently, as foraccumulating separate totals in each section.

The novel organization is arranged, by way of example, for using thesection of six highest and the section of six lowest denominations ofeach of the three twelve denomination register-units, herein shown,separately; so that the three twelve-denomination register-units afl'ordsix register-sections of six denominations each. I For eachregister-section there is an independent train, whereby the carriagecontrols the corresponding section of couplers I03.

Each register-section-selecting train includes a plate I05 which, as itis traversed by a registersection-selecting tappet I06 on the carriage40, is in depressed position, Figure 17, for placing the correspondingsection of couplers I03 in eilective position; the rest of the trainincluding, in order, a slide I01, a push-rod I00, a lever I00,connections from said lever I00 to a rock-shaft H0, and acoupler-section shifter III operable by said rock-shaft H0. Saidconnections are adapted according to the relative placement of saidlever I00 and rock-shaft N0, the several levers I00 being grouped,Figure 3, on a common fulcrum rod II2 while the array of the severalrock-shafts H0 is spread across the machine.

The several cam-plates I05 are spaced parallelly and grouped as inFigure l, and are guided by upper and lower combs |I3 provided on sidewalls Ill of the housing 03. Each cam-plate I05 has an upper edgecontour II5 proportioned relatively to the tappet I06 so that the latterat its engagement with sa'd contour maintains said cam-plate I05depressed, and the companion section of couplers I03 in effectiveposition, while the carriage traverses a zone of the same number ofdenominations (six) as the register-section. The tappet I00 depressesthe cam-plate I05, by overriding the bevel II8, as the carriage moves tothe higest denomination of said zone, and said tappet leaves thecam-plate at a similar bevel for consequent restoration of the cam-plateI05 and the rest of the described train as the carriage moves from thelast or lowest denomination of said zone. Said train, together with itssection of couplers I03, is restored by a spring III which may act onthe rock-shaft H0 as indicated in Figure 3. The spring-pressed-restoringmovement of the train is limited as by abutment of the end of aguide-slot H0 in the coupler-shifter III with a guide-stud 0, saidrock-shaft IIO having an arm I20, and a stud I2I thereon, engaging aslot I22 of the coupler-shifter II I.

A register-bar-guiding plate I23, attached, for each register-unit, tobosses I02 on the framework-cross-member I02, mounts the twocouplershiiters III, for said register-unit, by means of said guide-studH0 and guide-studs I24, Figure 12. The couplers I03 extend forwardlythrough an opening I23 in said plate I23, and the coupler-shifter IIIhas, within said opening I23, a shoulder II I, and also has, behind saidplate I23, a portion III" to engage the couplers I03.

The connections from the levers I00, on the common fulcrum rod II2, totheir companion rock-shafts IIO include levers I25, each engaged by thecompanion lever I00, as at I20, Figure 3. Said levers I25 are shown,Figure 3, arranged in two groups, each group having a commonfulcrum-stud I21 projecting from the crossmember I02 of thecomputing-base framework.

The levers I25 in each group may be connected to arms I28 of thecorresponding rock-shafts III by links I28.,or by pin-and-slotconnections as at I30, Figure 3. The rock-shafts III may be iournaled inlugs I3I on said cross-member I02.

The push-rods I08, pivotally connected at their lower ends to the leversI08, are guided at their upper ends by plates I32 provided in thecomputing base B and project above said plates for:

engagement with the companion slides I61 which work in upper and lowerslotted cross-bars I34 provided in, the housing 88. The relativelycrossed groups of cam-plates I05 and slides I01 are appropriatelyconnected by tabs I35 which may be provided on said slides I01.

Half of the several cam-plates I05 may have their tappet-engaged edgesII5 laterally ofl'set as a group from the group of similar edges II5 ofthe other half of said slides as in Figure 4. The right-hand andleft-hand groups of said tappet-engaged edges II5 correspond inverselywith the left-hand and right-hand sections of the severalregister-units, it being remembered that the carriage moves from thehighest to the lowest denomination in leftward direction while -theprogression of the register denominations from the highest to the lowestis to the right. There is similar transposition in the orders in whichthe master-racks 86 and the distributive racks 88 of thedenomination-selecting trains are connected to the bed of cross-blades88. Each denomination-selecting train is urged by a spring I38, attachedto the master-rack 86, to normal position determined by a stop, notshown, which engages the cross-blade 88.

The punctuation jacks 86, and a dummy Jack I38, connected to akey-locking train, work as a unit by means of a bail I31 pivoted to thehousing 83 and articulated to said jacks 88, I38 by pin-and-slotconnections I86. The key-lock train, Figures 18 and 19, includes apush-rod 8I connecting the dummy. jack I38 to a bellcrank 84 which inturn is connected to an arm I38 on a rock-shaft I40, having an arm Iconnected by a link I42 to a rock-shaft I43, Figure 18. Said rock-shaftI43, an arm I44 thereon, a series of tumblers I45, and pendent 50 stemsI46 of the numeral-key levers form the usual Underwood-Hansonkey-locking devices; the rocking of said shaft I43, effected at apunctuation space, causing said arm I44 to fill the usual gap in theseries of tumblers to block said pendent stems I46, and thereby locksaid numeral-key levers. The key-lock and punctuationjack train isrestored, as the tappet 82 leaves the punctuation jack, by a spring I41,Figure 2, pulling on an arm I48 of the rock-shaft I40, said arm I48stopping against a cross-bar I48 of the computing-base framework. Theweight of the punctuation jacks 86, I38 and the bail I31 iscounterbalanced in part by a spring I50 fastened to the face-plate 88and pulling on said bail I31. 65 The tabulating counter-stop 80, thedenomination-selecting tappet 82, and the register-sectionselectingtappet or tappets I06 are incorporated, for each computing zone, in atappet-unit I5I, having novel features of improvement designed 70 tofacilitate the differential placement, on the tappet-unit, of theregister-section-selecting tappets I06. The improvements also facilitateplacement of the tappet-unit upon the rack-structure and provide forembodying the several constitu- 75 out elements of the tappet-unit so asto conduce to the eiiiciency of said elements and economy of manufactureof the tappet-unit.

Amainsupportingrack Illandanauxiliary rack I53 provided on the carriage40 serve to support and locate the novel tappet-unit. A

body-block I64 of the tappet-unit is jogged as at I55 and is grooved fora suflicient distance from the jogged end, as at I56, to form teeth I51for articulation of the tappet-unit with rackteeth I58 provided alongthe bottom of the main rack I52. A strip I58 of resilient metal,attached to the top of the body-block I54, as by screws I60, is-formedinto a clip I6I at its end, to engage a groove I62 in the top of themain rack I52 for removably attaching the tappet-unit to said main rack.Said strip I58 is also provided with teeth I63 whereby the tappet-unitengages the auxiliary rack I53, said teeth I63 being formed by aU-shaped element I65, secured to the strip as at I66, Figure 6.

The tabulating counter-stop 80 is formed integrally with the body-blockI54. The denomination-selecting tappet 82 has a shank 82 driven into thebody-block I54, Figure 1, in order that said tappet 82 may be separatelyhardened, and ground and polished on it's jack-engaging surfaces, tominimize wear and friction.

For differential placement therein oi the register-section-selectingtappet or tapp'ets I06, the bottom portion of the body-block I54 isprovided with a sumcient number oi transverse slots I68 corresponding inspacing with the cam-plates I05. Figures 5 and 6 show a tappet-blank I06having an upper edge I68 for bearing against the bottom of the slot I68,and of T-shape to aiford shoulders I10 and side edges I" which areengaged by keeper-plates I12, one of the latter being detachablyfastened to each side of the body-block by screws I13. Figures 5 and 6.Each keeper-plate I12 is slotted or perforated as at I14 to form aborder-portion I15 which fits under the shoulders I10 and against theside edges "I of the tappet-blank I06 and keeps the latter firmly inplace, Figure 6. Upon removal of one and loosening of the other of thekeeper plates I12, the placement of one or more of the tappet-blanks I06in the appropriate slot or slots I68 may be easily eflected, whereuponthe keeperplates I 12 'may be secured again by the screws I13 to firmlykeep the tappet-blank I06 in place.

A roller I11, provided upon the rear end of the tappet-unit I5I, fits atrack I18, supported by the housing 83, to brace the tappet-unit I5I asit traverses the localized group of register-' controls comprising theregister-section-selecting cam-plates I65, and the jacks 8I, 86.

The tappet-unit I5I is shown provided with a tooth I18 for rocking acycling trip-lever I80 traversed by the carriage 49 and pivotallysupported by the plate 88. Said lever I80, incorporated in thetypewriter-unit A, is connected as at I8I to a train, similar to thedenominational jack-train, and comprising rods I16, I16, and abell-crank I82, Figure 4, to work a lever, in the computing base B,comprising an arm I83 engaged by said bell-crank I82 and an arm I84,joined to the arm'l83 by a yoke I85, the lever I83, I84, I85 beingloosely fulcrumed upon the rock-shaft I40. Said arm I84 of said leverengages an arm I86 of a rock-shaft I81, to rock the latter, to trip aclutch-mechanism 204, Figure 32, to connect a suitable power drive (notshown) to a shaft I 88 for cycling the latter by power. Said shaft I88may have a connection to drive the general operator which includes the 6register-bar-drlvlng cross-bar 10 for reciprocating the latter at arevolution or cycle of said shaft IIII. Bald connection, not shown, maybe of the kind shown in my co-pending application No. 15,789, fliedApril 11, 1035, and, briefly described, comprises a crank, not shown, onsaid .and includes a power operable toothed collar 204,

Figure 32, normally loose on the shaft I08. Upon releasing acontrol-disk 205', by withdrawing an .am 206', Figures 15, 32, 33,therefrom through the described rocking of said trip-shaft I81, a clutchdisk 201' fastened to said shaft I08 becomes connected to said collar20!- ior an ensuing revolution or cycle of said shaft I80.

The diagram at Figure 28 exemplifies a set-up, on the carriage 40, ofthe tabulating counterstops and tappet devices relative to the localizedgroup of the tabulating and register controls I5, I05, said set-up beingfor work-sheet form I08. The first column of said form I0! is for thansix denominations and are to be entered, by way of example, in theregister section consisting of the six lowest denominations ofnomination register-unit from the left in the computing base. The set-upincludes accordingly for said first column a tappet-unit (II in Figure28), which has, besides the counterstop 00 and thedenomination-selecting tappet 82, a register-section-selecting tappetI06 located on said unit ISI for engaging the edge iii of the secondcam-plate I05 from the front, Figures 4, 28.

At the operation of one of the .tabulating keys 14 of the six lowestdenominations, the carriage will advance and be arrested as thecounterstop 80 of said unit I5l strikes the carriage-stop 15 projectedby the operated tabulating key ll. At release of said tabulating key I4and retraction of the stop IS, the carriage settles as usual at thecorresponding denomination, and said second cam plate I05 from the frontwill have been depressed by the tappet I05 of said unit I5", and therebythe section of couplers I03, controlled by said second cam-plate fromthe front, will have been moved to eifective position to connect thesection of register-bars of the six lowest denominations of the firstregister-unit to the corresponding denomination-selecting trains, whichit will be remembered include the jacks 8| traversable by the tappet 02of said unit I5I It will be seen now that said tappet-unit ISI canselect no other register-section in the computing base but the onerepresented by its particularly placed tappet I06, namely, the sectionconsisting of the six lowest denominations of the first register-unitfrom the left. The desired register-section having thus been selectedfor said first column, the printing of an amount proceeds as usual, andconcomitantly the amount is indexed in the appropriate ones of theregister-bars 02 of the six lowest denominations of the firstregistenunit. Following the printing and indexing of the amount, thegeneral-operator cross-bar I0 is reciprocated to actuate the inthe firsttweive-dedexed register-bars to accumulate the indexed amount in thecomputing wheels 0i. which become engaged with the idlers 03 or racksIII as will'later-on be described, the accumulation being limited-to thecomputing wheels of the 6 six lowest denominations of the firstregisterunit, inasmuch as no total of amounts entered in said firstcolumn exceeds six denominations.

Suitable carry-over mechanism (not shown) is provided in associationwith the computing 10 wheels II of each register-unit. For example, saidcarry-over mechanism may be of the kind shown in my aforesaid Patent1,927,951.

The second column of the work-sheet form I03 in Figure 28 is also foramounts or totals not exceeding six denominations, and, by way ofexample, said amounts are to be accumulated in the register-sectionconsisting of the six lowest denominations of the middle register-unitoi twelve denominations in the computing base 13. A tappet-unit (III inFigure 28) for said second column is accordingly provided in the setupand has, besides the counter-stop 80 and denominationlecting tappet 02,a register-section-selecting tappet I00 located to engage the g5cam-edge II5 of the fourth cam-plate I05 from the front, Figures 4, 28.Thus, by tabulating the carriage to the second column position anddesired denomination therein, said fourth camplate I05 will becomedepressed and the correg0 sponding section of couplers I00 become movedto effective position to connect the sectionof register-bars 02,consisting of the ones of the six lowest denominations of the middleregisterunit, to the corresponding denominational trains. 5

The amount printed in saidsecond column will, therefore, be indexed andaccumulated in the register-section consisting of the six lowestdenominations of said middle register-unit.

The third-column of the form I98 is also for w amounts or totals notexceeding six denominations, said amounts to be entered, by way ofexample, in the register-section consisting of the six highestdenominations of the middle registerunit. The six lowest denominationsof tabulator- 5 keys I8 and corresponding stops I5 are used to tabulatethe carriage to the third column position irrespective of the use of aregister-section consisting of the six highest denominations of aregister-unit. A tabulatingstop 00 is therefore placed, for said thirdcolumn, with reference to said six lowest tabulating denominations. Butthe register-section-seiecting tappet I06 and denomination-selectingtappet 82 are oifset six de nominations not counting punctuation spaces)to the right of said third-column tabulating stop 00. The provision forthe third column, in the set-up of tappet-units on the carriage, maytherefore include, Figure 28, two complementary units I5I One of saidcomplementary units I5I has only the counter-stop 00 and is placed onthe carriage with reference to the aforesaid use of the tabulating steps15 of the-six lowest denominations. The other complementary unit I5I hasa denomination-selecting tappet 02, and 5 also has a register-selectingtappet I06 placed to engage the edge II5 of the third cam-plate I05 fromthe front, Figure 4, said other complementary unit I5I being placed toefl'ect the aforesaid offset, of its tappets 82, I06, of six denomina-7o tions to the right of said counter-stop 80.

By the described offsetting of the counter-stop 00 from the tappets 02,I00 for said third column, the section of denominational jacks 8|, whichcomprises what are ordinarily the six highest dearcane? nominations ofthe full complement of lacks II, is denominationally correlated tothesection of counterstops of the six lowest denominations. For example,if the tabulating key II for the tens of hundreds denomination ispressed -to position the carriage for typing, in the third column of theform I92, the amount 75.49, the carriagestop designated a in Figure 28will be projected and will arrest the resulting advance of the carriageby engaging the counterstop 00 of the unit Iii which is offset asdescribed, relatively to the tappets 02, I00 for said third column. withthe carriage thus positioned, the denomination- Jack marked 11, inFigure 28, and the third camplate from the front will have becomedepressed, respectively, by said third-column tappets 82, I00, andtherefore, as the amount 75.49 is printed, it

will become concomitantly indexed in the regis-.

ter-section consisting of what are ordinarily. the six highestdenominations of the middle registerunit of twelve denominations.

The fourth column of the form I93 is for amounts or totals up to twelvedenominations, said amounts being entered, by way of example, in theright-hand register-unit of twelve denominations. A tappet-unit (II inFigure 28), for said fourth column, includes, besides the counterstop 80and the denomination-selecting tappet 82, two of theregister-section-selecting tappets I06 placed to respectively engage theedges I I5 of the fifth and sixth cam-plates I05 from the front, Figures4 and 28. Thus, while the carriage traverses the six highestdenominations for said fourth column of the form I93, the fifth camplateI 05 from the front will be depressed, and thereby the section of sixcouplers I03 of highest denominations will have become shifted toeffective position to connect the six highest denomination-register bars92 "of the right-hand register-unit to the corresponding section ofdenominational trains. Then, as the carriage reaches and tranverses thesix lowest denominations for said fourth column, the sixth cam-platewill become depressed, and thereby, in turn, the six lowestdenomination-register bars 62 of said right-.- hand register-unit willbecome operatively connected to their corresponding section of thedenominational trains.

Full use of a register-unit, as, for example, for thetwelve-denomination fourth column of the form I98, may also be providedfor, by having. instead of the two cam-plates I05 for said unit, asingle cam-plate I 9|, Figure 14, having a camedge I90 substantiallycoextensive with all of the denominations of the register-unit. Only onecam-platedepressing tappet I06 is provided in the tappet-unit ISI fordepressing said camplate I94, and the latter is connected to simultaneously depress both slides I01 for said register-unit, and therebysimultaneously move both sections of the couplers I03 for saidregister-unit into effective position which is maintained while thecarriage traverses a zone at which the full register-unit is used. I95,Figure '14, represents an offset with which the cam-plate I94 isprovided to reach the offset tab I35 of one of the slides I 01, the tabof the other slide being directly under the cam-plate I94. A keeper-boltI92, Figures 13, 15, is screwed into the housing 98 to extend throughthe cam-plates I05, and is removable for interchange or replacement ofsaid cam-plates.

It will be'evident in the foregoing description concerning Figure 28that the accumulation of some amounts in one section of a register-unitand of other amounts in another section of the same register-unit isexemplified by the accumulation of the second and third column amountsrespectively in the right and left sections of the middle register-unit.

It will also be evident that the provision for sectional use of thelarge-reglster-nnits makes it feasible to have the "first ,three columnsof the form I 93 each no wider, substantially, than the illustrative sixdenominations (plus punctuation spaces) needed for the amounts enteredin said first three columns. I

Provision. for sectional use of the register-units also extends therange of usefulness of the ma,- chine. For example, where previousmachines. of the Underwood Hanson class, having three registers, each ofsay twelve denomination capacity, could only accumulate three totals, byusing all three of said register-units, even though none of the totalsexceeded six denominations, the present machine can accumulate saidthree totals of six denominations each, by using only two of the threeregister-units, and still have left for other totals a section of one ofsaid register-units and the entire third register-unit, the latter beingusable either sectionally for small totals, or in mu for totals up totwelve denominations For facilitating preparation of a set-up oftappet-units, and for quick replacement of one setup by another as whenthe work-sheet form is changed, novel supporting structure for thetappet-units, Figures 4, 6, 26 and 27, is arranged for removal andreplacement upon the carriage 49. In said structure the main tappet-unitsupporting rack IE2 is included and has attached to each of its endportions an arm or plate I96 having an upturned ear I9'I supporting anend of the auxiliary rack I89, the plates I96 and the racks I52, I52thus forming a frame, I98 which for removable attachment to the carriage49 is provided with posts I99. For supporting said frame I98, thecarriage 49 has a transverse angle-bar 200 securedat the ends of itsvertical leg by screws I to upturned ears 202 of carriagebrackets 203.The horizontal leg of said angle-bar 200 has a longitudinal slot 205 atone end and a transverse slot 206 at the other end for articulation withthe frame-posts I99, for which purpose each of the latter is providedwith a groove 20! designed to fit the thickness of the angle-bar 200 atsaid slots. A frame securing catch 208 is pivoted to the frame I90 by aheaded pivot 209 and hasa hook 2I0 to engage a pin 2 provided on theframe I98 near the transverse slot 200.

Figure 27 shows the frame I98 with one of its posts I99 first insertedin the longitudinal slot 205 preparatory to swinging said frameclockwise to enter the other post I99 in the transverse slot 206.Aspring 2I3 automaticallysnaps the catch 208 into engagement with thepin 2 as the frame becomesventered in said transverse slot 208. Saidcatch 208 is turnahle to the dotted outline position, Figure 26, torelease the frame I98 preparatory to withdrawing it from the transverseslot 208 for removal from the carriage, the removal being completed bysliding the frame endwise out of the longitudinal notch 205. Stops 2"limit the displacement of the catch 208. The auxiliary rack I53 isadjustable endwise by means of a screw 2I5 and nuts 2(0 which secure itat one end to the companion ear I 91, and the other end ofthe auxiliaryrack may be splined to the other car I91 as at 2", Figure 4, to holdsaidrack against turning.

The tappet-unit set-up frame I90 is pr with a cross-bar II! whichsupports a letterspace scale 220 by which the tappet-units iii are set:said cross-bar being fastened at its ends to the plates I86 togetherwith spacers 22I which serve to dispose said or -bar above thetappetunits IBI. each of the latter having an index 222 to read on saidscale 220. The catch-pivot 259 may serve to fasten one end of thecross-bar H9 and the underlying spacer Hi to the plate I36. At the otherend of the cross-bar, the parts, including one end of the scale 220, maybe fastened together by a screw 223, the other end of the scale beingsecured to the cross-bar 2I9 by a screw 224.-

The main rack I52 is shown provided, at-.a suitable number of pointsintermediate its ends. with studs 225 to bear at said points against thebottom of the horizontal leg of the angle-bar 200 which thus co-operatesto support the frame I98 against deflection induced by engagement of thetappet-units with the register-controls. The angle-bar 200 in turn mayagainst upward deflectlon'by having the upper side of its horizontal legbear against a roller 221 mounted on a bracket 228 attached to a plate228 forming part of the housing 19. Bevels 226 at the edge of theangle-bar 2!!!! guide the studs 225 under said angle-bar as the frameI98 is placed upon the carriage.

It will be seen that the setting-ur of the tap- -pet-units isfacilitated since it may be done in the frame I98 while the latter isdetached from the machine. Several of the frames I98, each having aprearranged set-up of tappet-unlts for a certain work-sheet form, may beprovided. so that when a change from one form to another is made, thecorresponding change .in the tappet-unit set-up interchange of theprearranged frames I 98.

Following the indexing of an amount in the register-bars 62 andpreceding the advance of the latter by the general-operator cross-bar16, the entire set of computing wheels iii, in each twelvedenomination-register unit which has been called into play by means ofthe carriagecontrolled register-sectlon-selecting trains, is shiftedinto mesh with either the corresponding idiers 63 or the register-barracks 64. For this purpose. and for disengaging said computing wheelsprecedent to the return of the registerbars, use maybe made of thecomputing-wheel shifting mechanism and state-controlling mechanismdisclosed in my co-pending application No. 607,275, filed April 25,1932. Said mechanism may be briefly described as follows.

Each twelve-denomination unit has a statecontroller 230. Figures -1, 16,extending fore and aft along the bottom of the computing base B andurged forward by a spring 23 l An upright latch-rod 232 projectingthrough a guide-plate 233 normally engages a shoulder 234, Figure 11, ofthe state-controller 230 to keep the latter in neutral position. Theupright-latchrod 232 is further guided by the register-guidebar plateI23 and pins 235, Figure 9, therein. Headed screws 236 slidably supportthe statecontroller 230 at its rear end-portion and at its forwardend-portion the statecontroller works in a guide 231 provided on aframe-cross member 239, Figure l.

A cam 238, Figure 10, on the state-controller works a cross-slide 23!,mounted on the guide 231, Figure 1, whereby a U-shaped member 240, a

connected to said cross-slide 235 and spiined to acomputing-wheei-shifting rock-shaft 2, is

be supported may be quickly effected by an 2, 9. 1o, 11, 12, 15 andshifted along the latter to engage either a yoke 242 having side arms243, or an arm 244. said yoke 242, with its side arms connected to theshiftable computing-wheel frame by links 245, is normally loose on therock-shaft 2 as is also the arm 244, the latter having a slot 246 forits connection to said frame 65 at 241. Upon the retraction of thelatch-rod 232 the resulting forward shift of the state-controller 230 islimited by asecondary latch-rod 249 engaging a shoulder 250, Figure 11,of said state-controller. Such limited state-controllershift acts,through the cross-slide 229 and companion member 240, to couple the arm244 to the computing-wheel rock-shaft 2. Upon retraction of asecondarylatch-rod 249 the resulting further shift of the state-controller 230acts to couple the yoke 242, 243, instead oi the arm 244, to .thecomputingwheel rock-shaft 24I.

with the arm 244 coupled to the rock-shaft 24 I, as a result ofretracting only the primary latchrod 232, the rocking of said shaft 2clockwise of Figure 1 will swing the frame S5 downwardly about an axle25I for the idiers 62. to mesh the computing wheels Iii with the racks64 for additive rotation of said wheels. with the yoke 242, 243, insteadof said arm 244, coupled to the rockshaft 2. as a result of retractingalso the secondary latch-rod 243. the clockwise rocking of the shaft 2will shift the frame 65"rearwardly to mesh the computing wheels ii withthe idiers 63 for subtractive rotation of said wheels. The rock-shaft 2remains rocked during the'advance of the register-bars 82. Before thereturn of the latter, said shaft 2 is rocked to its normal position. tothereby unmesh the computing wheels 6| from the racks 64 or idiers.Bymeans of operating connections not shown, but which may be of thenature described in my said copending application No. 607,275, saidrock-shaft 2 is worked in tion of the general-operator cross-bar I6. Bymeans of other connections not shown. a statetimed relation to thereciprocacontroller restorer 252 is worked in conjunction with the,return stroke of the general-operator cross-bar I6 to restore thestate-controller 220, cross-slide 2 39 and rock-shaft-coupling member240 to normal positions, following the unmeshing of the computing wheels6i. the latch-rods 222. 249 being urged by springs. not shown, toreengage the restored state-controller.

The secondary latch-rods 249 for the several register-units areconnected as at 254, Figure 2, to

said co-pending application No. 607,275.

Novel provision is herein made whereby the addition latch-rod 232 of aregister-unit is retracted coniointly with the carriage-effectedselection of a section of said register-unit, but irrespective of whichsection is selected. and said provision is shown embodied in the'following devices. Figures 8, 9, i0 and 12.

A latch-rod-retracting lever 256 is fulcrumed behind theregister-barguide-plate I23'on a stud 251 and is articulated to theprimary latch-rod 232, as at 258, Figure 10. At operation of one of theregister-section-seiecting trains for the register-unit by means of theearriage-tappet I06. said lever 256 is rocked clockwise from the Fi 9position to retract the latch-rod 282. For this purpose, the stud i2l ofthe coupier-shifter-actuating rock-shaft III of each train isoperatively connected to said lever 286; said lever 28! being di y nsasabie by the stud m of one rockshaft Ill, and the stud "I of the otherrockshaft III of the register-unit engaging an intermediate lever 28Lfulcrumed behind the plate I28 on a stud 282, said intermediate lever,in turn. c ms said latch-rod-retracting lever 258. As the left-handcoupler-shifter Iii, at Figure 9, is raised by its rock-shaft ill tomove the corresponding section of couplers I08 -to eifective position,the stud l2i directly engages the lever 258 and rocks the latter toretract the latch-rod 281 as illustrated in Figure 9. Should theright-hand coupler-shifter I ll be raised by its rock-shaft I III. thelatter, through its stud I, will rock the intermediate lever 2Hcounterclockwise, thereby, in turn. rocking the lateh-rod-retractinglever 28' to retract the latch-rod 222 as in Figure 12. Thus theoperation ofselecting either section of the register-unit retracts thelatch-rod 282 for resulting release of the state-controller 230 topredetermine additive rotation of the computing wheels 8|. If, inaddition to the thus effected retraction of the primary latch-rod 282,the secondary latch-rod 248 is also retracted, as by operation of thesubtractiomkey mechanism, the resulting further movement of thestate-controller 288 predetermines subtractive, instead of additive,rotation of the computing wheels II.

Provision for insuring restoration of the coupiers llll includes acam-slide 258 which has notches 258 forming cams 280 for engaging thestuds i2i of the coupler-shifting rock-shafts iill. Said cam-slide 252is slidablv guided by slots 28! of the framework cross-member "I2 and bystuds 264 on the frame I! and is yieldably held by a spring 286 innormal position. Figure 8, inwhich said notches 258 clear saidrock-shaft studs III. A push-rod 258', connected to said cam-slide 2B8,

- is slidable in a lug I02 of said cross-member "I2 and has its endnormally in the path of a earn 284 formed by a slot 288 in thegeneral-operator rack I88. Thus, during the advance stroke of thegeneral operator, said rack-cam 2" acts to displace said cam-slide 288to the Figure 8 posi-.

tion to depress any stud III which may have remained in raised position,thereby insuring restoration of the coupler-shifters Ill and couplers I"to their normal ineflective pofltions.

The novel mechanism for rendering the register and computing-basecontrolling trains incapable of actuation by the carriage under certainconditions will now be described.

It will be remembered that the bell-cranks N,

84' and 182, forming part of the denomination and punctuationjack-trains and cycle-tripping train, have the common fulcrum-rod II,and that the 'levers I88 of the register-section-selecting trains havethe common fulcrum-rod 2. By appropriate displacement of saidfulcrum-rods from their normal positions, a slack is formed in saidtrains relatively to the tappetsvl2, "l6 and the cycle-tripping toothI19 on the carriage as indicated in Figures 15, 16, and said trains arethereby disabled. A rock-shaft 265, iournaled in posts 2, on a cross-bar281 of the computingbase framework, Figure 3, is rockable to effectdisplacement and restoration of said fulcrumrods Ii. "2, said rock-shaft265 having upright arms 268. supporting the fulcrum-rod l5, andhorizontal arms 26!, from which links 218 depend and support thefulcrum-rod iii.

Alateh-arln 2Il ismounted on arock-shaft 212 and is connected to thelatter by a one-way-yieldable connection, comprising a spring 218 androckshai't arm 214. Said latch-arm 2ll normally engages a step 216 of anarm 216 of the fulcrumrod-controlling rock-shaft 2", to hold the latterand the fulcrum-rods Ii, 2 in the normal, Figure 2. positions, wherebythe aforesaid trains are in condition for actuation by the carriage.Upon withdrawing the latch-arm 2H therefrom, said arm 216 is turned bythe weight of the parts, and thereby rocks its shaft 266 until a secondstep 2'" on said arm 2" stops against the withdrawn latch-arm 2'. Thusthe withdrawal of said latch-arm 2' results in the fulcrum-rod 85 beinginstantaneously displaced rearwardly and the fulcrum-rod I I2 downwardlyto the Figure 16 positions, to instantaneously disable said trains.

Upon disablement of said trains the cam-plates I85 and slides I01 maydrop to the Figure 15, 16, position wherein said slides rest upon acushioning pad 218* provided upon one of the slide guiding cross-bars I.Slotted guides 218 on the crow-bar 2" guide the pendently-supportedfulcrum rod H2.

Figure 16 shows the usual Underwood shiftrail-frame 218 moved by thecasesshift key-lever 288 to shift the platen-frame It to upper-caseposition. By such shift to upper case, an arm "I, provided on saidshift-rail frame 218, works, through a link 2", to depress a lever 288.fulcrumcd, in the computing base, on the rock-shaft I. By means of acam-roll 284 thereon, said lever 288 displaces, as it is depressed, anarm 2 .of the shaft 212, to rock the latter, to withdraw the latch-arm2' from the first step' 2" of the arm 210, and thereby eflect theabove-described disablement of said register-controlling trains. Thus atuse of the numeral-key levers it for upper-case typing. at a zone, whichin lower case is a computing rone, indexing of the register-bars ,82 isprevented.

At the shift to upper case and the accompanying depression of the lever2", a side lug 281 of the latter, Figures 16, 33, idly passes aspring-pressed pawl 288 pivoted to an am 289 of the cycleelutch-trippingrock-shaft Ill, said pawl being momentarily turned by said lug to thedotted outline position, Figure 16, and then snapping back against astop 288, as said lever 288 becomesfuliy release of the shift-rail frame218, and the accompanying rise of the lever 288, the lug 281 encountersthe pawl 288, and thereby rocks said shaft I81 totrip the cycling clutch204. In the resulting power-driven revolution of the shaft I88, acam-roll "I, on a disk 282 mounted on said shaft I88, works againstaflange 283 of the arm 218, see Figure 80, to restore said arm 21 andits shaft 265,-whereupon a spring 294, Figure it, acts by means of thearm 214 to urge the latch-arm 2' back under the step 216 of said arm216. Said restoration of the parts by the cycling shaft I88 renders theregister-control trains and cycletripping train actuable by the carriageagain. A

cam 285 of said shaft I88, works against a roll 28!, on said latch-arm2'", Figure 80, to insure restoration of the latter.

Itwfllbeseenthatthe efiortrequiredtotrip the described latch-device.that is. to withdraw the latch-arm 2'", to render said trainsinoperative, is negligible, and therefore does not impair the usual easeof key-touch of the caseshift key-mechanism. Moreover, said trains aredisabled instantaneously, that is, in immediate depressed. But uponrestoration to lower case. by

response to ashiittoupper case. The powerdrivcn shaftI8I,whichiscausedtobe operatedas described at the return to lower case,takes up the burdmmin involved in disabling and restoring said Provisionis also made whereby at engagement of a power-o carriage-returnmechanism the latch-arm 21I is tripped to cause the register andcomputing-base control-trains to be disabled so as to be inoperable bythe carriage during a earrIage return run and whereby mrther, at theconclusion of said run. said cycling shaft I88 is caused to be actuatedto render said trains operative again.

Carriage-return mechanism herein shown, Figure 2, is substantially asdescribed in my Patent 1,624,068 dated April 12, 1927, and includes arack 288 on the carriage meshing with a driving pinion 299 havingclutch-teeth 800, said pinion being normally disengaged from aclutch-head 881 of a shaft 882 which is operable by power devices, notshown. and mounts said pinion 289. By manual operation of acarriage-return key 883, or by automatic operation of a lever 308 by thecarriage I! at the end of a line of typing, a latch-bar 805 is releasedat 886 for a resulting rearward movement by spring 881 to actuatelinkage to move the pinion 298 into engagement with the driving head 8Mfor a return movement of the carriage 89. Said linkage includes apinionshiiting rock-shaft 888 and an intermediate rockshaft 888. At theconclusion of the carriagereturn run the linkage is actuated todisengage the pinion 288 from the driving head 8M and for this purposeis connected to a carriage-controlled rock-shaft 818 by parts 8, 8I2,8I8 and 818, Figure 2.

Referring now to the aforesaid provision. a lever SIS, pivoted to thecomputing-base framework at 8N, is depressed by engagement of thecarriage-return mechanism and as it is depressed a side-lug Iii thereoiidly passes the pawl 288 on the arm 288 of the cycle-tripping rock-shaftI81. The pawl 2B8 consists of two similar portions 288*, Figures 82, 33,each portion having the form seen in the side view at Figure 16, andsaid portions having a connecting hub 288". The duplex pawl 288 pivotson a stud 8" of the arm 289, and a spring 818 normally presses the pawlagainst the stop 298, which is engaged by one 'of the pawl-portions288'. One pawl-portion 288' is engaged by the lever 288 which coactswith the case-shift mechanism, and the other pawl-portion 288 is engagedby said lever 8 I 5 which coacts with the carriage-return mechanism. Theconnections of said lever 815 to-the carriage-return mechanism includean arm SI! of the intermediate rock-shaft 808, a link 828 therefrom to abell-crank 321 pivoted to the housing 88, and a link 822 irom saidbell-crank connected to said lever 815 by a pin-and-slot connection MENSaid link 822 extends below said lever M5 and has a pin-and-slotconnection 823 to an arm 324 of the rock-shait 212 which mounts thelatch-arm 21 I, whereby the latter is caused to be withdrawn to disablesaid register and computing-base control-trains at the engagem 't of thecarriagereturn mechanism. Said pin-and-slot connection 823 enables theshaft 212 to be rocked independently of the carriage-return mechanism.

At the conclusion of the carriage-retum run,

intermediate rockshaft 208 to disengage the carriage-return pinion 298is eilected and the depressed lever 8I5 is concomitantly raised, causingits side-lug 816 to override the pawl 288 and thereby rock thecycletrippin shaft I88. The resultlnz cycle of the power-operated shaftI88 causes the restoration of said register and computing-basecontroltrains in the manner hereinbefore described.

Depression. manually. 0! a cycling key 828. Figure 29. rocks abell-crank 821, pivoted to the machine-frame at 828, and therebyth'nists rearwardly a link 828, slidably supported on said frame as at888, to displace an arm 88I of the cycle-tripping rock-shaft I81, andthereby rocks the latter to cause a cycle of the shaft I88 forreciprocating the general-operator cross-bar 18 which, it will beremembered, is opcratively connected to said shaft I88.

. During the cycling of the shaft I88 and general-operator cross-bar 18,it is desired to have the register and computing base control-trainsdisabled, so that if the cycle occurs while the carriage is still in acomputing zone, a registerbar 62 will not be in slightly advancedposition to obstruct the engagement of the computing wheels 8|. A roll888 on the disk 282 of the shaft I88 acts atthe start of the cycle towithdraw the latch-arm 21I to cause disablement of said control-trainsin the manner above described; said roll 888 engaging a roll 888 on abranch 885 of said latch-arm 21I. to withdraw the latter for a resultingdrop of the arm 218 and concomitant disablement of said trains, as inFigure 15; Near the end of the cycle or revolution of the shaft I88, theroller128I and the cam 285 of the shaft I88 act to restore the arm 216and latch-arm 2" in order that said control-trains'will be operativeagain after the cycle.

When it is desiredto use themachine solely for typinx. both in upper andlower case, a noncompute key 886 is operable for withdrawing thelatch-arm 2" to thereby render the registercontrol trains, and thecycle-tripping train which extends from the lever iflll incapabie oioperation by the typewriter-carriage 88 at such typing.

-mounts the latch-arm 21L With the machine operative for computing, thenon-compute key-bar 881 is in the forward or "on" (computing) position,Figure 29, determined by abutment of a lug 8 thereof against the guide888.

To condition the machine for typing without computing, the non-computekey-bar 881 is shifted rearwardly to "ofl position, Figure 31, therebyrocking the ioined arms 841, 882, and the shaft 212 to withdraw thelatch-arm 2" for theresulting disablement of said register-control andcycle-tripping train, the arm 882 working against an arm 885 of saidrock-shaft 212; said arm 885 forming a one-way connection which permitssaid rock-shaft 212 to be operated independently of the non-computekey-mechanism. By means oi a side-lug 846 thereon, the arm 842, whenrocked by rearward shift of the non-compute key-bar 881, engages thepawl 288 and turns it to the Figure 31 position, to thereby operativelydisconnect the cycle-tripping rock-shaft I81 from the case-shift andarriage-return mechanisms. The non-compute key-bar 881 and the partsshifted thereby to the Figure 29 positions become locked in saidpositions. for maintaining the non-compute condition of the forms partof a bar 881,

